Quote:
Originally Posted by sales@delicioustuning.com
None, whatsoever. Rear o2 fuel trimming is disabled in the majority of our tunes anyways.
Sincerely,
Zach
Delicious Tuning
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Sure you can disable it
So what is the function of the rear 02 trim ?
why is all that code in ecu ?
"Closed Loop Fueling Target Compensation (Rear O2) Limits (Max)" – This is the max closed loop fueling
target adder based on rear o2 input. The factory default is set to an extreme value so that the limit never
comes into play. However, this can be set to zero to eliminate this compensation on the positive side.
• "Closed Loop Fueling Target Compensation (Rear O2) Limits (Min)" - This is the min closed loop fueling
target adder based on rear o2 input. The factory default is set to an extreme value so that the limit never
comes into play. However, this can be set to zero to eliminate this compensation on the negative side.
• "A/F Learning #3 Limits (Max/Min)" - These are the max and min values for the long-term fuel trim based on
rear o2 input. The factory defaults are set to extreme values so that the limits never come into play. However,
these can be both set to zero to eliminate the influence of the rear o2 based long-term fuel trim.
· "A/F Correction #3 Limits (Max/Min)" – These are max and min values for the short-term fuel trim based on
rear o2 input. The factory defaults are set to extreme values so that the limits never come into play. However,
these can be both set to zero to eliminate the influence of the rear o2 based short-term fuel trim.
· "A/F Correction #3 Adder (Increase) A", "...(Increase) B"), "...(Decrease) A", and "...(Decrease) B" – These are
the adders to the short-term rear o2 based fueling correction. Setting all four to zero will remove the influence
of the rear o2 based short-term fuel trim